I have never in my life experienced that being so distracted you burn the food situation. It's pretty weird Kei did, seeing how he's actually a professional cook!
Get off his back, she was the one maintaining the status quo rather than risk rocking the boat. This is why childhood friends never win in the triangle scenario if their target is the male lead. Some girl is practically throwing herself at the dude, but the childhood friend is over there pulling a surprised pikachu face like "Why did he never notice my feelings for him while I hid them?!"